don’t know if this’ll help, but you can try to reactive your parasympathetic nervous system (rest & digest system, while sympathetic is fight or flight). breathe in and then make the motion of breathing out but don’t actually breathe out, kind of like you’re trying to push out air but don’t let yourself. my therapist taught me to do this during exams when I start going into fight or flight & it really helps to ground me <3 best of luck I hope you’re able to get it figured out and feel better!!